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Jerez de la Frontera, Spain

Gallardo A.,University of Seville | Lopez M.A.,University of Seville | Lara M.,IFAPA Rancho La Merced | Maistrello L.,University of Modena and Reggio Emilia | And 2 more authors.
Vitis - Journal of Grapevine Research | Year: 2016

The implementation of the mating disruption technique against the grape berry moth, Lobesia botrana (Denis and Schiffermüller) (Lepidoptera, Tortricidae), in Integrated Pest Management (IPM) Sherry vineyards (Andalusia, South-western Spain) reduced the number of chemical treatments required to manage this serious pest. In order to verify the long term consequences of this type of management on the minor pests of vineyards, a study was carried out over nine years to compare the population levels of four phytophagous insect species (Altica ampelophaga, Planococcus citri, Jacobiasca lybica, Aphis gossypii) in plots where L. botrana was managed with conventional chemical treatments or using mating disruption. Field data on secondary pests were collected on randomly chosen vines at different times on different plant organs such as leaves, shoots and bunches, depending on the type of pest, according to the ATRIA procedure (Andalusian IPM procedure). Results showed a significant increase of grapevine infestation by all four secondary pest species in the plots managed with grape berry moth mating disruption. These findings represented a limitation for the implementation of this technique in Andalusian vineyards. © The author(s). Source


Pineiro Z.,IFAPA Rancho La Merced | Canepa D.,University of Cadiz | Palma M.,University of Cadiz | Barroso C.G.,University of Cadiz
International Journal of Food Science and Technology | Year: 2012

Evolution of both catechin and epicatechin grape seed content was established for ten white and six red grape varieties during the ripening period. Chemometric techniques (cluster analysis and partial least squares analysis) were used for data analysis. An initial increasing stage and a final stabilisation step for both compounds have been observed for most varieties during ripening, including both red and white grape varieties. On the other hand, three red varieties (Tintilla de Rota, Tempranillo and Graciano) and two white varieties (Vijiriega and Muscat á Petit Grain) kept away from the rest showed particular trends. Graciano was the only cultivar that presented differences in catechin and epicatechin behaviour during its ripening period. © 2011 The Authors. International Journal of Food Science and Technology © 2011 Institute of Food Science and Technology. Source


Puertas B.,IFAPA Rancho La Merced | Jimenez M.J.,IFAPA Rancho La Merced | Cantos-Villar E.,IFAPA Rancho La Merced | Pineiro Z.,IFAPA Rancho La Merced
International Journal of Food Science and Technology | Year: 2013

The impact of dry ice maceration (DIM) and oak cask fermentation (OCF) on characteristics of Tempranillo wines elaborated in a warm climate has been studied as an alternative procedure to traditional red winemaking (CT) to obtain highly coloured wines. Oenological and colour parameters were measured to determine the influence of these techniques on wines along the winemaking process. DIM and OCF techniques were found significantly different to CT for colour intensity and percentage of blue. Moreover, both induced easily perceptible changes in CIELAB coordinates (lower L*, higher a* and Cab * values) than CT and also affect main wine's sensory attributes (e.g. increased polyphenols extraction in DIM and to a lesser extent OCF, and therefore produced wines with higher colour than CT). Although differences tend to decrease with ageing, these practices seem feasible alternatives to improve quality characteristics of young red wines from grapes grown in warm climates. © 2012 The Authors. International Journal of Food Science and Technology © 2012 Institute of Food Science and Technology. Source

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